How to Install Pond Liner In Deck Floor - Step 1

So I came up with this idea when I was removing my deck flooring and flipping them over. They were getting way too slippery after 35 years and some boards needed replaced so I couldn't just power wash the floor. 

At least half of it. The other half of the deck was slippery but no bad boards so I power washed them. This shows the boards once they were flipped (not nailed down yet) compared to the boards still needing removed.

I was sitting on the deck looking out at my ponds when I decided I would take one of the two pond liners I had downstairs and put it into the deck so it would be level with the floor. I built in one liner in my family room and we use it to house the smaller fish from our smaller pond over the winter. We start koi and other fish in our small pond and move them to the large pond once they are too big for the bass in the big pond to eat.

Here's step 1. I removed the boards and one of the joists (after bracing it) so I could drop this in. Next step is to build a platform under the liner so there is no weight stress on the deck floor. The deck sits about 3 1/2 foot above the ground. Then I'll cut the floor boards to fit.

Bookmark my site if you're interested in seeing the final result. I have some other ideas for the deck floor as well. You'll want to see the final result.